Ok so I was planing on getting a smaller blower when my friend and i put the Lingenfelter gt2-3 cam in and a nice set of comp springs and pinned the crank, hoping to spin out a smaller blower to make power on the top end (new 7k redline) but I got an awesome deal on a used kit with a freshly refurbished D1SC and an larger then stock IC. now im worried that it may be a recipe for disaster let me know what you guys think

 

Well i would guess everyone is going to tell you need more details....Is it a stock motor with just cam and springs??? What are your power goals??? No matter what i seriously doubt the D1 is too big. With 8lbs you are looking at the 500ish+rwhp...of course the power you make will be very dependent on the rest of the mods and how good of a tune you get. For some people there is no such thing as TOOO much....

 

its a stock internals ls2 (with a 7k redline Lingenfelter gt2-3 cam, 918 springs, kooks 1 3/4 headders 3x3 Cat-less X into C6Z cans , part of the install is going to be a AIS meth kit

 

D1sc is never too much I can spin my motor to 7200 if needed, but it is not stock

 

You will be ok. Check out Mr. Big's setup on the stock LS2 block. He is in the neighborhood of 700+rwhp I believe.

 

i have been a big fan of his for some time,but hes running 317 heads i belive so his cr is lower any what way im running this just for as long as it takes to forged stuff in the block

 

You can also pully the blower to make less boost untill you go forged if your starting to push the stock limits.

 

What's the basic difference between the ATI ProCharger P-1SC and the D-1SC?
The P-1SC and the D-1SC both use the same housing. The internals of the D-1SC are designed to handle more boost than what the P-1SC can produce. If you have both of these blowers producing say, 8 psi, the D-1SC would end up having a larger pulley on the head unit, as it doesn't have to be spun as fast to produce the boost. In theory the P-1SC should start producing boost a little sooner than the D-1SC in the rpm band, but I really can't tell a difference between the two.
Many people start out with the P-1SC as they feel that adding the supercharger is all they are ever going to do with their vehicle. Power is contagious, and once most of us get a feel for it, we end up wanting more. 8 psi is about all I recommend on the stock bottom end of an LS engine, adding forged rods and pistons to these engines gives you the ability to up the boost into the 14 psi and up range. The P-1SC isn't going to get you there, especially if you add more cubes, cam and heads.

How much boost the blower can produce depends on many variables.
* Cubic inch. The larger the engine the less boost it will make with a supercharger.
* Headers and exhaust. A better flowing system will produce less boost, requires a smaller pulley to regain the loss in boost. Ultimately though, more power will be gained.
* Camshaft and heads. A camshaft with some overlap will leak out some boost through the valves. Better flowing heads react a lot like a better flowing exhaust system.
* Altitude. Elevation plays a big part in how much boost is produced. Those people living in the higher elevations have to spin the blower harder to see boost.
* Condition of engine. An engine with real good sealing rings will ultimately produce more boost than one with worn rings.
* Rpm. An engine that is spun up higher in the rpm range will normally produce more boost. Bob

 

an f2 should be just right!

 

stock pistons lol

any how thanks bob, for all the info, but what i think im really trying to get at is will a D1SC with a stock pulley (3.75") on a stock ls2 with the supporting mods ive listed before and the cam be too much for the stock pistons if i spin it to 7k, or will it make like 14-15 psi at that point and execute a few of my pistons

 

i'll trade you my vortech v9 kit for it haha

 

yah no, sorry

 

Why do you HAVE to spin it to 7000rpm?

RPM is only rpm and some motor combos won't produce power that high so it's pointless to spin the motor to 7000rpm.

Now if your setting a 7000rpm goal because that is where you'll be rolling through the traps at that rpm then that is a different story.

Now with a 3.75in pulley I think you'll be around +13psi so I think you need a ~+4in pulley to decrease boost.
*Now that is on a C5 Corvette, I don't know if there are any pulley differences between fbod and corvette so take it for what it's worth.

 

There really should be no stock pulley's, every system ordered is tailored to the customer's requirements, if ordered correctly. If I were you I would start with a 4.25 pulley and see how much boost you are making. I would shoot for 7 to 8 psi at 7000 rpm, since that is what you want to spin it to. Bob

 

i have a C6

 

guess its time to start a wtb bigger pulley thread

 

so any one have a used 4"+ pulley I would prefer not to have to buy a new one since i have decided to forge the stock bottom this winter

 

Are you a six or eight rib setup? I'm assuming eight, but thought I'd ask...I have a 4" pulley but its a six rib...

 

nope im going to try to keep the 6 rib so that would work pretty good i dont think the 4" will make too much if i dont spin it too high what did it make for you?

 

I have no idea...it came with the used kit I bought along with a 3.63 (I think) pulley that's on the car now. I made 8psi with the 3.63 on a stock internal motor...rest of my mods are in sig. I'm actually not going to be using either one since I'm converting to an 8-rib setup, so if you're interested in either, let me know.